In the specific embodiment provided in FIGS. 2A, 2B, and 3, the hollow interior of the lower housing section 118 defines the conical chamber section 252 of the lower chamber section 124, and the lower housing section 118 also includes a straight tip that defines the outlet of the microwave plasma torch 100. The upper housing section 116 includes the first upper housing length 116a and the second upper housing length 116b, and the at least one cylindrical chamber section 250 includes a first cylindrical chamber section 250a that is defined within the first upper housing length 116a, and a second cylindrical chamber section 250b defined in the second upper housing length 116b. The discharge portion 170 of the upper chamber section 122 is defined in the second cylindrical chamber section 250b, and the at least one conductive rod 140 is positioned within the torch chamber 220 such that the tip 142 of the conductive rod 140 is disposed within discharge portion 170 (second cylindrical chamber section 250b).

In an additional embodiment such as shown in FIGS. 2B, 3 and 4, the second cylindrical chamber section 250b is disposed between the first cylindrical chamber section 250a and the conical chamber section 252, and a diameter of the first cylindrical chamber section 250a is less than a diameter of the second cylindrical chamber section 250b.